Re: [DIYbio] Re: Microbial Fuel Cell

On 06/25/2013 10:01 AM, Pieter wrote:
> Does any have suggestions for cheap proton exchange membranes?
>

Ask the suppliers of reverse osmosis systems and membranes...
http://www.culliganmatrixsolutions.com/industrial/water-treatment-products/water-filter-membranes/

http://www.astom-corp.jp/en/en-main2-neosepta.html seems involved in a range of processes...

http://www.mega.cz/heterogenous-ion-exchange-membranes-ralex.html
The RALEX membranes are heterogeneous ion-exchange membranes produced in MEGA a.s. Stráž pod Ralskem, Czech Republic, since 1985.
Cation-exchange membrane RALEX CMH transmits cations...

http://www.fujifilmmembranes.com/?gclid=CKL7j4na_7cCFSgS7AodpXMAfg
Ion exchange membranes which enable energy generation from two water streams with different salinity levels.

I'm sure they all know about DuPont Nafion® perfluorosulfonic acid membranes from the 60's and
might provide their own lower cost alternatives by now.

One hit by googling was selling N117 at $1604/sq meter or $0.16 per sq cm
and it was DuPont brand. Another in Taiwan had a photo of DuPont logo...

But this is what you were looking for:

"We supply PFSA resin and its dispersion and membrance. Good quality equiv. to Nafion. More competitive price. For more details,
please contact us." http://www.alibaba.com/product-gs/334124252/PERFLUOROSULFONIC_ACID_PTFE_COPOLYMER.html

Also this one: http://www.alibaba.com/product-gs/320855784/Nafion_H.html
But they have a wrong photo in place of their "Nafion Perfluorosulfonic Acid Resin,Nafion-H,Rf-SO3H direct from factory with
better price.", so communication may be difficult.

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